We began by draining the old pond and found our biggest challenge. The pond had been settling over the years due to heavy rock placed on the back plastic edges. To make things worse, we found some cracks that were causing the pond to leak.
The leaking water would pool beneath the plastic tub, effectively trying to push it out of the ground. To fix all of this, the tub would have to have holes cut in the bottom and a drainage system put in place before we dropped a new rubber liner over it.